An official website of the United States government.

The .gov means it's official.
Federal government websites always use a .gov or .mil domain. Before sharing sensitive information online, make sure you're on a .gov or .mil site by inspecting your browser's address (or "location") bar.

This site is also protected by an SSL (Secure Sockets Layer) certificate that's been signed by the U.S. government. The https:// means all transmitted data is encrypted - in other words, any information or browsing history that you provide is transmitted securely.

Thesaurus Search Results

periodicity
Subject Category
S Biological Sciences
W Physical and Chemical Sciences
Definition
The tendency of a phenomenon to recur at regular intervals; in biological systems, the recurrence of certain activities (including hormonal, cellular, neural) may be annual, seasonal, monthly, daily, or more frequently (ultradian).
Definition Source
Medical Subject Headings 2013
RDF/XML Format:
http://lod.nal.usda.gov/nalt/17466.rdf
Persistent URI:
http://lod.nal.usda.gov/nalt/17466
Used For
bioperiodicity
cyclicity
Broader Term
biological rhythms
space and time
Narrower Term
photoperiodism
Related Term
brain waves
life cycle (organisms)
migratory behavior
migratory species
potamodromous fish
seasonal development
seasonal growth
seasonal variation
swarming
Spanish
periodicidad
Term Number
17466